Question

research suggests marijuana use in adolescence may increase the risk of developing schizophrenia because

○ marijuana use enlarges brain ventricles
○ marijuana use at this age causes frontal lobe abnormalities
○ chemicals in marijuana increase dopamine activity
○ marijuana use at this age changes brain structure

Explanation:

Research indicates that marijuana's chemicals (like THC) enhance dopamine activity. Dopamine dysregulation is linked to schizophrenia. While other options (enlarged ventricles, frontal lobe issues, brain structure changes) might be associated with schizophrenia or marijuana use, the key mechanism here is dopamine - related. THC in marijuana can act on the brain's reward system, increasing dopamine release, which may contribute to the increased risk of schizophrenia in adolescents who use marijuana.

Answer:

C. chemicals in marijuana increase dopamine activity